When paver extensions are used, segregation can be reduced by keeping the length of extensions relatively equal on both sides.

• A. True
• B. False
• C. Sometimes
• D. Not applicable

Answer: (A)

Symmetry of paver extensions affects how evenly the mix is placed. Keeping the length of extensions relatively equal on both sides ensures the asphalt flows under the screed evenly, helping maintain a uniform mat thickness across the paving width. When extensions are balanced, there’s less tendency for the larger aggregates to segregate from fines at the edges or along the joint, because the material isn’t being pushed more heavily on one side and then dumped or pulled away on the other. If one side is longer, material can accumulate there, changing thickness and density locally and increasing segregation. Therefore, this practice reduces segregation. While this helps, other factors like mix temperature, screed speed, and compaction also influence segregation.